Re: [PATCH v2 for-rc] RDMA/hns: Fix bug during CMDQ initialization

[Jason Gunthorpe <jgg@nvidia.com>]

On Sat, Mar 13, 2021 at 10:30:11AM +0800, Weihang Li wrote:
> From: Lang Cheng <chenglang@huawei.com>
> 
> When reloading driver, the head/tail pointer of CMDQ may be not at position
> 0. Then during initialization of CMDQ, if head is reset first, the firmware
> will start to handle CMDQ because the head is not equal to the tail. The
> driver can reset tail first since the firmware will be triggerred only by
> head. This bug is introduced by changing macros of head/tail register
> without changing the order of initialization.
> 
> Fixes: 292b3352bd5b ("RDMA/hns: Adjust fields and variables about CMDQ tail/head")
> Signed-off-by: Lang Cheng <chenglang@huawei.com>
> Signed-off-by: Weihang Li <liweihang@huawei.com>
> ---
> Changes since v1:
> - Only retain the bugfix part for -rc branch.
> - Link: https://patchwork.kernel.org/project/linux-rdma/patch/1615541933-35798-1-git-send-email-liweihang@huawei.com/
> 
>  drivers/infiniband/hw/hns/hns_roce_hw_v2.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)

Applied to for-rc, thanks

Jason